The abcoulomb is the charge flowing in 1 second given a current of 1 abampere.
3.
The definition of the abcoulomb follows from that of the abampere : given two parallel currents of one abampere separated by one centimetre, the force per distance of wire is 2 dyn / cm.
4.
In these other systems, the abcoulomb is " not " used; CGS-esu and Gaussian units use the statcoulomb is instead, while the Lorentz-Heaviside unit of charge has no specific name.
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